Martin Luther King Day

San Francisco's police chief resigns amid racial issues

San Francisco's police chief resigned Thursday at the request of the mayor hours after an officer fatally shot a young black woman driving a stolen car — the culmination of several racially charged incidents in the past year.

Pressure had been mounting for the resignation of Chief Greg Suhr since December, when five officers fatally shot a young black man carrying a knife. Since then, there have been protests, moves to reform the police department and a federal review of its protocol.

Mayor Ed Lee supported the chief in December and again in April after it was disclosed that three officers had exchanged racist text messages.

The texting scandal was the second to...